Electric circuit service head



Feb. 2, 1943. E, E PHILLIPS 2,309,920

ELECTRIC CIRCUIT SERVICE HEAD Filed Aug. 15, 1941 'INVEN TOR. EarZEIPhtZZ vpS Patented Feb. 2, 1943 UNITED STATES PATENT OFFICE ELECTRICCIRCUIT SERVICE HEAD Earl E. Phillips, Schuylerville, N. Y.

Application August 15, 1941, Serial No. 407,048

1 Claim.

My invention relates to electric circuits, and has among its objects andadvantages the provision of an improved service head for branchingcircuit wires from an entrance cable.

In the accompanying drawing:

Figure 1 is an elevational View of the service head and its supportingbracket;

Figure 2 is a transverse sectional view of the structure of Figure 1;

Figure 3 is an enlarged transverse sectional view;

Figure 4 is a plan View of the back section of the service head;

Figure 5 is a plan View of the top section of the service head;

Figure 6 is a sectional view taken along the line 6-6 of Figure 3;

Figure '7 is a sectional view along the line l l of Figure 5; and

Figure 8 is a sectional view along the line 8-8 of Figure 5.

In the embodiment selected for illustratlon, a service head l0 comprisesa bottom section I2 and a top section l4. These sections are identicalin external contour with the exception that the section I4 is providedwith flanges l6 embracing end margins of the section l2. Both sectionsare of elliptical contour, when viewed according to Figures 4 and 5, inaddition to being the same in size so that the flanges [6 have closefitting engagement with the end margins of the section l2.

The imier face of the section I2 is provided with a large cable orconduit receiving groove [8 which intersects one end of the section andis of a length slightly exceeding half the major axis of the section.Three smaller grooves are also provided in the inner face of the sectionI2, all of which smaller grooves have communication with the largergroove l8, but extending in the same general direction.

Section N is also provided with three diverging grooves 22 having thesame arrangement and proportion as the grooves 20. All three grooves 22combine at 24. Three grooves 26 are also ,provided in the section l4,which grooves are arranged in diverging relationship in the same manheras the grooves 22 and have common communication at 24.

In assembly, the groove face of the section !4 lies in engagement withthe groove face of the section l2. In one position the grooves 22 lie inregistration with the grooves 20 to provide openings 28 for therespective accommodation of wires 30 fanning from a conduit 32 extendinginto the groove 18. In cases Where relatively small wires correspondingto the wires 30 are employed, the section I4 is reversed to bring thegrooves 26 into registration with the grooves 20.

To secure the sections 12 and I4 in assembled relationship, a metallicband 34 is used which en circles the two sections. Each section isrecessed at 36 across its two side edges for the reception of the band34, and the ends of the band overlap. One end is provided with anenlargement 38 provided with a threaded opening for a screw 40 extendingthrough a slot 42 in the other end of the band. Thus the band is heldfirmly in position through mere tightening of the screw 40, and theflanges l6 act on the section l2 to hold the two sections l 2 and M inperfect registration. An opening 44 is provided in the band 34 for thereception of a screw 46 which may be threaded into a suitable supportingstructure for mounting the service head. Figure 3 illustrates a recess48 in the section I! for accommodating the head of the screw 46, whichrecess has communication with the channel 24 so that the screw isaccessible when the section I4 is removed.

Figures 1 and 2 illustrate the service head ID in association with abracket 50 provided with insulators 52 for respective reception of thewires 30, the latter being made secure by set screws 54. From theinsulators 52 the wires 32 may extend to the terminals of the apparatusor appliance serviced by the head. In cases Where the bracket isemployed, the screw 46 is removed and a short screw substitutedtherefor, with the nut 56 of the short screw 58 lying in a groove 60 inthe bracket 50. The screw 58 extends through a slot 62 in the bracket 50so that the service head l0 may be shifted to different positions on thebracket and made secure in the desired position through tightening ofthe screw 58.

Bracket 50 is recessed at 64 to lend easier accessibility to the nut 56.A plurality of openings 66 is formed in the bracket for the reception ofscrews to secure the bracket to a suitable supporting structure. Bothsections l2 and M are formed of insulating material.

Without further elaboration, the foregoing will so fully illustrate myinvention, that others may, by applying current knowledge, readily adaptthe same for use under various conditions of service.

I claim:

An electric circuit service head comprising a first section having aconduit entrance and grooves, circuit wires branching from the conduitentrance and lying in said grooves, a second section overlying saidfirst section and provided with and a fastening bolt extending throughsaid band, the first section and said slot for connecting the parts intoa unitary structure, said service head being adjustable on said bracketlongitudinally 5 of said slot.

EARL E. PHILLIPS.

